[A case of esophageal cyst resected by thoracoscopic surgery].

A 59-year-old woman was admitted with back pain and an abnormal chest shadow in the left hilar region. Her chest CT scan showed a posterior mediastinal mass surrounding the descending aorta. By transesophageal ultrasonography, a diagnosis of mediastinal cyst was made. She underwent thoracoscopic resection under general anesthesia with new endoscopic devices including endo-scissors, endoscopic hemoclips and electrocautery. Pathologically, the tumor was an esophageal cyst lined by ciliated columnar and squamous epithelium overlying smooth muscle layers. She made an uneventful recovery. Her back pain subsided following the operation. Thoracoscopic resection is a useful technique for patients with mediastinal cystic tumor.